Robert Oster X Joshua Thorp ink bottle 50ml, Jacaranda Jewel

A breathtaking violet-purple inspired by Adelaide's iconic jacaranda trees in full spring bloom.

Robert Oster X Joshua Thorp Ink Collection

Created in collaboration with South Australian ink maker Robert Oster, the Joshua Thorp Collection celebrates a shared love of fine writing, thoughtful colour, and the art of penmanship. Each ink in this series is designed with care to evoke mood, place, and story, from quiet moments at the desk to the vibrant life of Adelaide and beyond.

The Remarkable Robert Oster

Robert Oster is a South Australian colour creator whose inks reflect his passion, creativity, and deep connection to the Australian landscape. His colours are known worldwide for their beautiful shading, reliability, and expressive character on the page.

Crafted in South Australia, Robert Oster Signature Inks are handmade and inspired by the colours of the continent. They offer smooth flow, distinctive character, and are presented in recyclable 50ml PET bottles manufactured in Australia's first carbon neutral plastics plant. All Robert Oster inks are 100% Australian made and non-toxic, created with care for both the writer and the environment.

A drink for your pen.